| |
| #include <assert.h> |
| #include <stdlib.h> |
| #include <errno.h> |
| #include <stdarg.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "util.h" |
| |
| /* |
| * Return an allocated memory area. |
| */ |
| void * |
| xmalloc(size_t size) |
| { |
| void *ptr; |
| |
| assert(size > 0); |
| |
| if ((ptr = malloc(size)) == NULL) |
| err(1, NULL); |
| |
| return ptr; |
| } |
| |
| |
| /* |
| * Resize an allocated memory area. |
| */ |
| void * |
| xrealloc(void *ptr, size_t size) |
| { |
| void *newptr; |
| |
| assert(ptr != NULL); |
| assert(size > 0); |
| |
| if ((newptr = realloc(ptr, size)) == NULL) |
| err(1, NULL); |
| |
| return newptr; |
| } |
| |
| /* |
| * 4.4BSD err(), warn() functions reimplementation. |
| */ |
| |
| |
| void |
| err(int status, const char *fmt, ...) |
| { |
| va_list ap; |
| |
| va_start(ap, fmt); |
| verr(status, fmt, ap); |
| va_end(ap); |
| } |
| |
| void |
| verr(int status, const char *fmt, va_list ap) |
| { |
| int olderrno = errno; |
| |
| fprintf(stderr, "csubst: "); |
| if (fmt != NULL) { |
| vfprintf(stderr, fmt, ap); |
| fprintf(stderr, ": "); |
| } |
| fprintf(stderr, "%s\n", strerror(olderrno)); |
| |
| exit(status); |
| } |
| |
| void |
| errx(int status, const char *fmt, ...) |
| { |
| va_list ap; |
| |
| va_start(ap, fmt); |
| verrx(status, fmt, ap); |
| va_end(ap); |
| } |
| |
| void |
| verrx(int status, const char *fmt, va_list ap) |
| { |
| fprintf(stderr, "csubst: "); |
| if (fmt != NULL) |
| vfprintf(stderr, fmt, ap); |
| fputc('\n', stderr); |
| |
| exit(status); |
| } |
| |
| void |
| warn(const char *fmt, ...) |
| { |
| va_list ap; |
| |
| va_start(ap, fmt); |
| vwarn(fmt, ap); |
| va_end(ap); |
| } |
| |
| void |
| vwarn(const char *fmt, va_list ap) |
| { |
| int olderrno = errno; |
| |
| fprintf(stderr, "csubst: "); |
| if (fmt != NULL) { |
| vfprintf(stderr, fmt, ap); |
| fprintf(stderr, ": "); |
| } |
| fprintf(stderr, "%s\n", strerror(olderrno)); |
| } |
| |
| void |
| warnx(const char *fmt, ...) |
| { |
| va_list ap; |
| |
| va_start(ap, fmt); |
| vwarnx(fmt, ap); |
| va_end(ap); |
| } |
| |
| void |
| vwarnx(const char *fmt, va_list ap) |
| { |
| fprintf(stderr, "csubst: "); |
| if (fmt != NULL) |
| vfprintf(stderr, fmt, ap); |
| fputc('\n', stderr); |
| } |