diff options
Diffstat (limited to 'lib/libc/gen/fmtmsg.c')
| -rw-r--r-- | lib/libc/gen/fmtmsg.c | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/lib/libc/gen/fmtmsg.c b/lib/libc/gen/fmtmsg.c new file mode 100644 index 0000000..6caabbb --- /dev/null +++ b/lib/libc/gen/fmtmsg.c @@ -0,0 +1,220 @@ +/*- + * Copyright (c) 2002 Mike Barcroft <mike@FreeBSD.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <fmtmsg.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +/* Default value for MSGVERB. */ +#define DFLT_MSGVERB "label:severity:text:action:tag" + +/* Maximum valid size for a MSGVERB. */ +#define MAX_MSGVERB sizeof(DFLT_MSGVERB) + +static char *printfmt(char *, long, const char *, int, const char *, + const char *, const char *); +static char *nextcomp(const char *); +static const char + *sevinfo(int); +static int validmsgverb(const char *); + +static const char *validlist[] = { + "label", "severity", "text", "action", "tag", NULL +}; + +int +fmtmsg(long class, const char *label, int sev, const char *text, + const char *action, const char *tag) +{ + FILE *fp; + char *env, *msgverb, *output; + + if (class & MM_PRINT) { + if ((env = getenv("MSGVERB")) != NULL && *env != '\0' && + strlen(env) <= strlen(DFLT_MSGVERB)) { + if ((msgverb = strdup(env)) == NULL) + return (MM_NOTOK); + else if (validmsgverb(msgverb) == 0) { + free(msgverb); + goto def; + } + } else { +def: + if ((msgverb = strdup(DFLT_MSGVERB)) == NULL) + return (MM_NOTOK); + } + output = printfmt(msgverb, class, label, sev, text, action, + tag); + if (output == NULL) { + free(msgverb); + return (MM_NOTOK); + } + if (*output != '\0') + fprintf(stderr, "%s", output); + free(msgverb); + free(output); + } + if (class & MM_CONSOLE) { + output = printfmt(DFLT_MSGVERB, class, label, sev, text, + action, tag); + if (output == NULL) + return (MM_NOCON); + if (*output != '\0') { + if ((fp = fopen("/dev/console", "a")) == NULL) { + free(output); + return (MM_NOCON); + } + fprintf(fp, "%s", output); + fclose(fp); + } + free(output); + } + return (MM_OK); +} + +#define INSERT_COLON \ + if (*output != '\0') \ + strlcat(output, ": ", size) +#define INSERT_NEWLINE \ + if (*output != '\0') \ + strlcat(output, "\n", size) +#define INSERT_SPACE \ + if (*output != '\0') \ + strlcat(output, " ", size) + +/* + * Returns NULL on memory allocation failure, otherwise returns a pointer to + * a newly malloc()'d output buffer. + */ +static char * +printfmt(char *msgverb, long class, const char *label, int sev, + const char *text, const char *act, const char *tag) +{ + size_t size; + char *comp, *output; + const char *sevname; + + size = 32; + if (label != MM_NULLLBL) + size += strlen(label); + if ((sevname = sevinfo(sev)) != NULL) + size += strlen(sevname); + if (text != MM_NULLTXT) + size += strlen(text); + if (text != MM_NULLACT) + size += strlen(act); + if (tag != MM_NULLTAG) + size += strlen(tag); + + if ((output = malloc(size)) == NULL) + return (NULL); + *output = '\0'; + while ((comp = nextcomp(msgverb)) != NULL) { + if (strcmp(comp, "label") == 0 && label != MM_NULLLBL) { + INSERT_COLON; + strlcat(output, label, size); + } else if (strcmp(comp, "severity") == 0 && sevname != NULL) { + INSERT_COLON; + strlcat(output, sevinfo(sev), size); + } else if (strcmp(comp, "text") == 0 && text != MM_NULLTXT) { + INSERT_COLON; + strlcat(output, text, size); + } else if (strcmp(comp, "action") == 0 && act != MM_NULLACT) { + INSERT_NEWLINE; + strlcat(output, "TO FIX: ", size); + strlcat(output, act, size); + } else if (strcmp(comp, "tag") == 0 && tag != MM_NULLTAG) { + INSERT_SPACE; + strlcat(output, tag, size); + } + } + INSERT_NEWLINE; + return (output); +} + +/* + * Returns a component of a colon delimited string. NULL is returned to + * indicate that there are no remaining components. This function must be + * called until it returns NULL in order for the local state to be cleared. + */ +static char * +nextcomp(const char *msgverb) +{ + static char lmsgverb[MAX_MSGVERB], *state; + char *retval; + + if (*lmsgverb == '\0') { + strlcpy(lmsgverb, msgverb, sizeof(lmsgverb)); + retval = strtok_r(lmsgverb, ":", &state); + } else { + retval = strtok_r(NULL, ":", &state); + } + if (retval == NULL) + *lmsgverb = '\0'; + return (retval); +} + +static const char * +sevinfo(int sev) +{ + + switch (sev) { + case MM_HALT: + return ("HALT"); + case MM_ERROR: + return ("ERROR"); + case MM_WARNING: + return ("WARNING"); + case MM_INFO: + return ("INFO"); + default: + return (NULL); + } +} + +/* + * Returns 1 if the msgverb list is valid, otherwise 0. + */ +static int +validmsgverb(const char *msgverb) +{ + char *msgcomp; + int i, equality; + + equality = 0; + while ((msgcomp = nextcomp(msgverb)) != NULL) { + equality--; + for (i = 0; validlist[i] != NULL; i++) { + if (strcmp(msgcomp, validlist[i]) == 0) + equality++; + } + } + return (!equality); +} |
