[409] | 1 | /********************************************************************* |
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| 2 | * Copyright 2010, UCAR/Unidata |
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| 3 | * See netcdf/COPYRIGHT file for copying and redistribution conditions. |
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| 4 | * $Header$ |
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| 5 | *********************************************************************/ |
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| 6 | |
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| 7 | #include "config.h" |
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| 8 | |
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| 9 | #include <stdlib.h> |
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| 10 | #include <stdio.h> |
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| 11 | #include <fcntl.h> |
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| 12 | #include <stdarg.h> |
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| 13 | #include <string.h> |
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| 14 | |
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| 15 | #include "nclog.h" |
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| 16 | |
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| 17 | #define PREFIXLEN 8 |
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| 18 | #define MAXTAGS 256 |
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| 19 | #define NCTAGDFALT "Log"; |
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| 20 | |
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| 21 | static int ncinitlog = 0; |
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| 22 | static int nclogging = 0; |
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| 23 | static int ncsystemfile = 0; |
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| 24 | static char* nclogfile = NULL; |
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| 25 | static FILE* nclogstream = NULL; |
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| 26 | |
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| 27 | static int nctagsize = 0; |
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| 28 | static char** nctagset = NULL; |
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| 29 | static char* nctagdfalt = NULL; |
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| 30 | static char* nctagsetdfalt[] = {"Warning","Error","Note","Debug"}; |
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| 31 | static char* nctagname(int tag); |
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| 32 | |
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| 33 | void |
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| 34 | ncloginit(void) |
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| 35 | { |
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| 36 | ncinitlog = 1; |
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| 37 | ncsetlogging(0); |
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| 38 | nclogfile = NULL; |
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| 39 | nclogstream = NULL; |
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| 40 | /* Use environment variables to preset nclogging state*/ |
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| 41 | /* I hope this is portable*/ |
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| 42 | if(getenv(ENVFLAG) != NULL) { |
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| 43 | const char* file = getenv(ENVFLAG); |
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| 44 | ncsetlogging(1); |
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| 45 | nclogopen(file); |
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| 46 | } |
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| 47 | nctagdfalt = NCTAGDFALT; |
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| 48 | nctagset = nctagsetdfalt; |
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| 49 | } |
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| 50 | |
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| 51 | void |
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| 52 | ncsetlogging(int tf) |
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| 53 | { |
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| 54 | if(!ncinitlog) ncloginit(); |
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| 55 | nclogging = tf; |
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| 56 | } |
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| 57 | |
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| 58 | void |
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| 59 | nclogopen(const char* file) |
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| 60 | { |
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| 61 | if(!ncinitlog) ncloginit(); |
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| 62 | nclogclose(); |
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| 63 | if(file == NULL || strlen(file) == 0) { |
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| 64 | /* use stderr*/ |
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| 65 | nclogstream = stderr; |
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| 66 | nclogfile = NULL; |
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| 67 | ncsystemfile = 1; |
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| 68 | } else if(strcmp(file,"stdout") == 0) { |
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| 69 | /* use stdout*/ |
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| 70 | nclogstream = stdout; |
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| 71 | nclogfile = NULL; |
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| 72 | ncsystemfile = 1; |
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| 73 | } else if(strcmp(file,"stderr") == 0) { |
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| 74 | /* use stderr*/ |
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| 75 | nclogstream = stderr; |
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| 76 | nclogfile = NULL; |
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| 77 | ncsystemfile = 1; |
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| 78 | } else { |
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| 79 | int fd; |
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| 80 | nclogfile = strdup(file); |
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| 81 | nclogstream = NULL; |
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| 82 | /* We need to deal with this file carefully |
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| 83 | to avoid unauthorized access*/ |
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| 84 | fd = open(nclogfile,O_WRONLY|O_APPEND|O_CREAT,0600); |
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| 85 | if(fd >= 0) { |
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| 86 | nclogstream = fdopen(fd,"a"); |
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| 87 | } else { |
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| 88 | free(nclogfile); |
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| 89 | nclogfile = NULL; |
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| 90 | nclogstream = NULL; |
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| 91 | ncsetlogging(0); |
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| 92 | } |
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| 93 | ncsystemfile = 0; |
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| 94 | } |
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| 95 | } |
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| 96 | |
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| 97 | void |
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| 98 | nclogclose(void) |
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| 99 | { |
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| 100 | if(nclogstream != NULL && !ncsystemfile) { |
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| 101 | fclose(nclogstream); |
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| 102 | } |
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| 103 | if(nclogfile != NULL) free(nclogfile); |
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| 104 | nclogstream = NULL; |
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| 105 | nclogfile = NULL; |
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| 106 | ncsystemfile = 0; |
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| 107 | } |
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| 108 | |
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| 109 | void |
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| 110 | nclog(int tag, const char* fmt, ...) |
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| 111 | { |
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| 112 | va_list args; |
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| 113 | char* prefix; |
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| 114 | if(!nclogging || nclogstream == NULL) return; |
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| 115 | |
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| 116 | prefix = nctagname(tag); |
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| 117 | fprintf(nclogstream,"%s:",prefix); |
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| 118 | |
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| 119 | if(fmt != NULL) { |
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| 120 | va_start(args, fmt); |
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| 121 | vfprintf(nclogstream, fmt, args); |
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| 122 | va_end( args ); |
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| 123 | } |
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| 124 | fprintf(nclogstream, "\n" ); |
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| 125 | fflush(nclogstream); |
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| 126 | } |
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| 127 | |
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| 128 | void |
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| 129 | nclogtext(int tag, const char* text) |
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| 130 | { |
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| 131 | nclogtextn(tag,text,strlen(text)); |
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| 132 | } |
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| 133 | |
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| 134 | void |
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| 135 | nclogtextn(int tag, const char* text, size_t count) |
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| 136 | { |
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| 137 | if(!nclogging || nclogstream == NULL) return; |
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| 138 | fwrite(text,1,count,nclogstream); |
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| 139 | fflush(nclogstream); |
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| 140 | } |
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| 141 | |
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| 142 | /* The tagset is null terminated */ |
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| 143 | void |
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| 144 | nclogsettags(char** tagset, char* dfalt) |
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| 145 | { |
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| 146 | nctagdfalt = dfalt; |
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| 147 | if(tagset == NULL) { |
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| 148 | nctagsize = 0; |
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| 149 | } else { |
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| 150 | int i; |
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| 151 | /* Find end of the tagset */ |
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| 152 | for(i=0;i<MAXTAGS;i++) {if(tagset[i]==NULL) break;} |
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| 153 | nctagsize = i; |
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| 154 | } |
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| 155 | nctagset = tagset; |
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| 156 | } |
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| 157 | |
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| 158 | static char* |
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| 159 | nctagname(int tag) |
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| 160 | { |
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| 161 | if(tag < 0 || tag >= nctagsize) { |
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| 162 | return nctagdfalt; |
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| 163 | } else { |
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| 164 | return nctagset[tag]; |
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| 165 | } |
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| 166 | } |
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